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stuttering choppy video!

Posted: Thu, 16th Oct 2008, 2:27pm

Post 1 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

VisionLab User MacOS User

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hey guys!!
ok i am really liking your fantastic software, but one thing is putting me off! i am recording HD 720p video on my sanyo camera (H.264 format) and then converting to QT movie, but when playing back its very choppy??
skipping frames and makes it very frustrating to work with effects etc

i am using an intel based macbook with 2ghz CPU and 2gb RAM, latest OSX installed (leopard)

should i be changing the compression/frame rates etc

sorry to be a pain its just like a slide show at the moment

cheers
Posted: Thu, 16th Oct 2008, 5:01pm

Post 2 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

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anyone please? smile
Posted: Thu, 16th Oct 2008, 5:40pm

Post 3 of 13

FXhomer46784

Force: 493 | Joined: 24th Dec 2007 | Posts: 329

EffectsLab Pro User Windows User

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You are changing the compression, just based on the fact that you're converting the format.

You definitely shouldn't change the framerate unless you have a very specific reason to do so.
Posted: Thu, 16th Oct 2008, 9:03pm

Post 4 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

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thanks for the reply but sorry it didnt help much! i mean vision lab does not support H.264 right?
or does it?

i just want to know why i cannot get the video to play smoothly, normally if i import my video into final cut then i just do a quick render first and all is good smile

so any help would be great, thanks! smile
Posted: Thu, 16th Oct 2008, 10:23pm

Post 5 of 13

FXhomer46784

Force: 493 | Joined: 24th Dec 2007 | Posts: 329

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badmonk wrote:

thanks for the reply but sorry it didnt help much! i mean vision lab does not support H.264 right?
correct

badmonk wrote:

i just want to know why i cannot get the video to play smoothly, normally if i import my video into final cut then i just do a quick render first and all is good smile
Why can't you just do this then? I guess I'm confused.
Posted: Thu, 16th Oct 2008, 10:24pm

Post 6 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

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ok i just played around with some fx and then rendered the file as a QT movie and it plays back fine smile

so do you think i should convert my movies shot with my sanyo camera to AVI or MOV please?
(i use QT pro for the compression)

what is the best format to import into visionlab please?

many thanks smile
Posted: Thu, 16th Oct 2008, 10:44pm

Post 7 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

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ok i think i have worked this out smile
(sorry to be a pain in the a$$ but really thinking about buying this)

i hit the P button once my quicktime mov was imported onto the timeline to give its in/out points and then hit the preview render timeline selection button which then very quickly rendered all my video and it plays at normal speed now with no skipping or choppy movements smile

this is much better as i can preview my videos easier now!!

when i convert my video to QT MOV though should it be progressive or does this matter at all please?
Posted: Fri, 17th Oct 2008, 12:34am

Post 8 of 13

FXhomer46784

Force: 493 | Joined: 24th Dec 2007 | Posts: 329

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badmonk wrote:

ok i think i have worked this out smile
(sorry to be a pain in the a$$ but really thinking about buying this)

i hit the P button once my quicktime mov was imported onto the timeline to give its in/out points and then hit the preview render timeline selection button which then very quickly rendered all my video and it plays at normal speed now with no skipping or choppy movements smile
Yeah, although the lab products are really great at what they do, they aren't really designed for real-time previews, so doing a preview render really helps. Sorry, I probably should have mentioned that sooner.

badmonk wrote:

when i convert my video to QT MOV though should it be progressive or does this matter at all please?
Progressive vs. interlaced questions seem pretty common. Yes, it does matter.

Optimally, you want interlaced (opposite of progressive) video if you'll be displaying your video on a tv screen and progressive if it will be on a computer screen. Of course one generally works with the other, but quality suffers slightly. So it's your call as to which you want. Distribution by DVD probably benefits from interlaced. Distribution online (personal website, youtube, etc) should be progressive. Then again, in many cases, you may want a version of both.

If you shot interlaced footage, then I would keep it interlaced until your final render (i.e. after you've converted it, added effects, cut it back into your main video, added sound, etc.), even if you want a progressive cut in the end. This accomplishes two things: (1) you don't lose any data from the extra interlaced fields, (2) if you ever want to also make an interlaced or archived copy, you only have to redo that last render, instead of rendering both versions all the way back to that conversion step.

If you shot progressive footage in the first place, you might as well just keep it progressive all the way through. You won't actually gain anything by converting back to interlaced.



Bottom Line: I wouldn't change this setting when converting the video, but it is definitely a good question to ask yourself when finishing a project.

Note: Also be sure that whatever method you choose matches your settings when you start a new FxHome project. People have problems with this all the time, and after you click ok, you cannot change this setting without starting a new project.
Posted: Fri, 17th Oct 2008, 8:37am

Post 9 of 13

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

The Lab products are doing different things to an editor like Final Cut. When using effects the frames have to be rendered before they are shown. You can find out more about the system here:

http://fxhome.com/support/video-tutorials/view/6/preview-rendering
Posted: Fri, 17th Oct 2008, 9:43am

Post 10 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

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thanks for the great replies guys smile
the support on here is some of the best i have seen, so thanks for that! smile

btw i am a good friend of flameboy (adam) working with him at the moment on 'kick ass' (based on the comic book)

cheers again
Posted: Fri, 17th Oct 2008, 9:47am

Post 11 of 13

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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FXhome Team Member

Ah cool, always good to find out about FXhome connections. smile We had a great time working with Adam a few weeks back. Say hi to him for us. smile
Posted: Fri, 17th Oct 2008, 2:39pm

Post 12 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

VisionLab User MacOS User

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yeah cheers Tarn!! smile

he is here now with me, so we are trying to figure out how to use your software!!

thanks again!
Posted: Fri, 17th Oct 2008, 6:13pm

Post 13 of 13

badmonk

Force: 1197 | Joined: 17th Dec 2007 | Posts: 92

VisionLab User MacOS User

Gold Member

yay!! figured out how to mask stuff!!
awesome!! this is one amazing piece of software guys smile